Learning how to hear the bass notes

It is not easy.


A piano helps playing on the left side of the keyboard along with listing to a reproduced musical composition.


Trial and error seems a good way.


It is difficult to begin with a song such as Just Hold Me - Maria Mena


More easy to begin, songs or musical compositions are:


Just 4 bass notes throughout:


With or without you - U2


Just 8 notes throughout:


Canon in D - Pachebel


Bass is the basis or foundation (Βασις) of music and all harmony (chords) springs from it [Bach].


Reference, further reading:


Bach Bass Rules:


https://normanschmidt.net/scores/bachjs-general_bass_rules.pdf